1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head>
<meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type" />
<!--
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
This file is generated from xml source: DO NOT EDIT
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
-->
<title>mod_proxy_express - Apache HTTP Server Version 2.5</title>
<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" />
<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" />
<script src="../style/scripts/prettify.min.js" type="text/javascript">
</script>
<link href="../images/favicon.ico" rel="shortcut icon" /></head>
<body>
<div id="page-header">
<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/quickreference.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
<p class="apache">Apache HTTP Server Version 2.5</p>
<img alt="" src="../images/feather.png" /></div>
<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
<div id="path">
<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.5</a> > <a href="./">Modules</a></div>
<div id="page-content">
<div id="preamble"><h1>Apache Module mod_proxy_express</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/mod/mod_proxy_express.html" title="English"> en </a> |
<a href="../fr/mod/mod_proxy_express.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p>
</div>
<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Dynamic mass reverse proxy extension for
<code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></td></tr>
<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>proxy_express_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_proxy_express.c</td></tr></table>
<h3>Summary</h3>
<p>This module creates dynamically configured mass reverse
proxies, by mapping the Host: header of the HTTP request to
a server name and backend URL stored in a DBM file.
This allows for easy use of a huge number of reverse proxies
with no configuration changes. It is much less feature-full
than <code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code>, which also provides
dynamic growth, but is intended to handle much, much
larger numbers of backends. It is ideally suited as a
front-end HTTP switch and for micro-services architectures.</p>
<p>This module <em>requires</em> the service of <code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code>.</p>
<div class="warning"><h3>Warning</h3>
<p>Do not enable proxying until you have <a href="mod_proxy.html#access">secured your server</a>. Open proxy
servers are dangerous both to your network and to the Internet at
large.</p>
</div>
<div class="note"><h3>Limitations</h3>
<ul>
<li>This module is not intended to replace the dynamic capability of
<code class="module"><a href="../mod/mod_proxy_balancer.html">mod_proxy_balancer</a></code>. Instead, it is intended to be mostly
a lightweight and fast alternative to using <code class="module"><a href="../mod/mod_rewrite.html">mod_rewrite</a></code>
with <code class="directive">RewriteMap</code> and the <code>[P]</code> flag
for mapped reverse proxying.
</li>
<li>It does not support regex or pattern matching at all.
</li>
<li>It emulates:
<pre class="prettyprint lang-config"><VirtualHost *:80>
ServerName front.end.server
ProxyPass "/" "back.end.server:port"
ProxyPassReverse "/" "back.end.server:port"
</VirtualHost></pre>
That is, the entire URL is appended to the mapped backend
URL. This is in keeping with the intent of being a simple
but fast reverse proxy switch.
</li>
</ul>
</div>
</div>
<div id="quickview"><h3 class="directives">Directives</h3>
<ul id="toc">
<li><img alt="" src="../images/down.gif" /> <a href="#proxyexpressdbmfile">ProxyExpressDBMFile</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#proxyexpressdbmtype">ProxyExpressDBMType</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#proxyexpressenable">ProxyExpressEnable</a></li>
</ul>
<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_proxy_express">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_proxy_express">Report a bug</a></li></ul><h3>See also</h3>
<ul class="seealso">
<li><code class="module"><a href="../mod/mod_proxy.html">mod_proxy</a></code></li>
<li><code class="directive"><a href="../mod/mod_proxy.html#balancermember">BalancerMember</a></code></li>
<li><code class="directive"><a href="../mod/mod_proxy.html#balancergrowth">BalancerGrowth</a></code></li>
<li><code class="directive"><a href="../mod/mod_proxy.html#balancerpersist">BalancerPersist</a></code></li>
<li><code class="directive"><a href="../mod/mod_proxy.html#balancerinherit">BalancerInherit</a></code></li>
<li><a href="#comments_section">Comments</a></li></ul></div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="ProxyExpressDBMFile" id="ProxyExpressDBMFile">ProxyExpressDBMFile</a> <a name="proxyexpressdbmfile" id="proxyexpressdbmfile">Directive</a><a title="Permanent link" href="#proxyexpressdbmfile" class="permalink">¶</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Pathname to DBM file.</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyExpressDBMFile <pathname></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>None</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_express</td></tr>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3.13 and later</td></tr>
</table>
<p>The <code class="directive">ProxyExpressDBMFile</code> directive
points to the location of the Express map DBM file. This
file serves to map the incoming server name, obtained from
the Host: header, to a backend URL.</p>
<div class="note"><h3>Note</h3>
<p>The file is constructed from a plain text file format using
the <code><a href="../programs/httxt2dbm.html">httxt2dbm</a></code>
utility.</p>
<div class="example"><h3>ProxyExpress map file</h3><p><code>
##<br />
##express-map.txt:<br />
##<br />
<br />
www1.example.com http://192.168.211.2:8080<br />
www2.example.com http://192.168.211.12:8088<br />
www3.example.com http://192.168.212.10<br />
</code></p></div>
<div class="example"><h3>Create DBM file</h3><p><code>
httxt2dbm -i express-map.txt -o emap<br />
</code></p></div>
<div class="example"><h3>Configuration</h3><p><code>
ProxyExpressEnable on<br />
ProxyExpressDBMFile emap<br />
</code></p></div>
</div>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="ProxyExpressDBMType" id="ProxyExpressDBMType">ProxyExpressDBMType</a> <a name="proxyexpressdbmtype" id="proxyexpressdbmtype">Directive</a><a title="Permanent link" href="#proxyexpressdbmtype" class="permalink">¶</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>DBM type of file.</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyExpressDBMFile <type></code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>"default"</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_express</td></tr>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3.13 and later</td></tr>
</table>
<p>The <code class="directive">ProxyExpressDBMType</code> directive
controls the DBM type expected by the module. The default
is the default DBM type created with <code>
<a href="../programs/httxt2dbm.html">httxt2dbm</a></code>.</p>
<p>Possible values are (not all may be available at run time):</p>
<table class="bordered"><tr class="header"><th>Value</th><th>Description</th></tr>
<tr><td><code>db</code></td><td> Berkeley DB files</td></tr>
<tr class="odd"><td><code>gdbm</code></td><td> GDBM files</td></tr>
<tr><td><code>ndbm</code></td><td> NDBM files</td></tr>
<tr class="odd"><td><code>sdbm</code></td><td> SDBM files (always available)</td></tr>
<tr><td><code>default</code></td><td> default DBM type</td></tr>
</table>
</div>
<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="directive-section"><h2><a name="ProxyExpressEnable" id="ProxyExpressEnable">ProxyExpressEnable</a> <a name="proxyexpressenable" id="proxyexpressenable">Directive</a><a title="Permanent link" href="#proxyexpressenable" class="permalink">¶</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enable the module functionality.</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>ProxyExpressEnable [on|off]</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>off</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_proxy_express</td></tr>
<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3.13 and later</td></tr>
</table>
<p>The <code class="directive">ProxyExpressEnable</code> directive
controls whether the module will be active.</p>
</div>
</div>
<div class="bottomlang">
<p><span>Available Languages: </span><a href="../en/mod/mod_proxy_express.html" title="English"> en </a> |
<a href="../fr/mod/mod_proxy_express.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p>
</div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed again by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Freenode, or sent to our <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div>
<script type="text/javascript"><!--//--><![CDATA[//><!--
var comments_shortname = 'httpd';
var comments_identifier = 'http://httpd.apache.org/docs/trunk/mod/mod_proxy_express.html';
(function(w, d) {
if (w.location.hostname.toLowerCase() == "httpd.apache.org") {
d.write('<div id="comments_thread"><\/div>');
var s = d.createElement('script');
s.type = 'text/javascript';
s.async = true;
s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier;
(d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s);
}
else {
d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>');
}
})(window, document);
//--><!]]></script></div><div id="footer">
<p class="apache">Copyright 2018 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/quickreference.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div><script type="text/javascript"><!--//--><![CDATA[//><!--
if (typeof(prettyPrint) !== 'undefined') {
prettyPrint();
}
//--><!]]></script>
</body></html>
|
